I had a kombucha culture going for about a year. I'd find that it oscillated quite a lot in that time between delicious and vinegar, I've yet to crack the code of what it needs and when.

Mixing it with fresh pineapple juice before bottling made it way better in my opinion. Just enough juice to get carbonation, nothing extreme.

Also just to add that kombucha can be quite alcoholic so if OP is looking to reduce ethanol intake it may not be the best option without a way to be absolutely sure it's low alcohol.